How are the semi circle and the diameter of a circle related?

Which expressions are equivalent to -6 + 3m

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655